/*
 * Copyright 2009 XueSong Guo.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.webwheel.di.engine;

import cn.webwheel.di.Key;
import cn.webwheel.di.NativeProvider;

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

class NativeProviderImpl implements NativeProvider {

    private final DefaultContainer container;
    private final Map<Key, TypeNativeProvider> tnpmap = new ConcurrentHashMap<Key, TypeNativeProvider>();

    private boolean javac;

    public NativeProviderImpl(DefaultContainer container) {
        this.container = container;
        javac = System.getProperty("webwheel.di.nojavac") == null;
    }

    @SuppressWarnings("unchecked")
    public Object get(Key key) {
        TypeNativeProvider provider = tnpmap.get(key);
        if (provider == null) {
            if (javac) {
                tnpmap.put(key, provider = new CompileTypeNativeProviderGen(container, key).gen());
            } else {
                tnpmap.put(key, provider = new ReflectTypeNativeProvider(container, key));
            }
        }
        return provider.get();
    }
}
